文章摘要
王林泉,罗玉红,戴泽龙,胥焘,李晓玲,黄应平.香溪河沉积物重金属形态分布特征及生态风险评价[J].农业环境科学学报,2017,36(8):1610-1617.
香溪河沉积物重金属形态分布特征及生态风险评价
Characteristics and ecological risk assessment of heavy metals in sediments of the Xiangxi River
投稿时间:2017-03-02  
DOI:10.11654/jaes.2017-0255
中文关键词: 重金属  形态  生态风险评价  沉积物  香溪河
英文关键词: heavy metal  fraction  ecological risk assessment  sediment  Xiangxi River
基金项目:国家水专项子课题(2012ZX07104-003-04);国家重点研发计划(2016YFD08009002);科技惠民计划项目(S2013GMD100042);湖北省创新群体项目(2015CFA021)
作者单位E-mail
王林泉 三峡大学水利与环境学院, 湖北 宜昌 443002  
罗玉红 三峡大学水利与环境学院, 湖北 宜昌 443002
三峡大学三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北 宜昌 443002
三峡大学三峡库区生态环境教育部工程研究中心, 湖北 宜昌 443002 
 
戴泽龙 三峡大学三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北 宜昌 443002  
胥焘 三峡大学水利与环境学院, 湖北 宜昌 443002
三峡大学三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北 宜昌 443002
三峡大学三峡库区生态环境教育部工程研究中心, 湖北 宜昌 443002 
 
李晓玲 三峡大学三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北 宜昌 443002
三峡大学三峡库区生态环境教育部工程研究中心, 湖北 宜昌 443002 
 
黄应平 三峡大学水利与环境学院, 湖北 宜昌 443002
三峡大学三峡地区地质灾害与生态环境湖北省协同创新中心, 湖北 宜昌 443002
三峡大学三峡库区生态环境教育部工程研究中心, 湖北 宜昌 443002 
chem_ctgu@126.com 
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中文摘要:
      于2016年6月,在三峡库区香溪河流域设置5个样点,采集30个样品,通过五步连续提取法对Pb、Cd、Cu、和Cr重金属总量及形态进行分析,运用聚类分析法探讨香溪河流域沉积物各重金属的分布特征,利用基于形态学研究的次生相和原生相比值法对香溪河沉积物中重金属进行了生态风险评估。结果表明:研究区域重金属的变异系数大小为Pb>Cd>Cu>Cr,聚类分析将样点分为三类,其中贾家店(XX04)为一类,三岔沟(XX01)、水库干流与香溪河交汇处(XXCJ)为一类,峡口(XX06)、平邑口(XX08)为一类;形态分析表明,Cu主要以有机物及硫化物结合态和残渣态存在,Pb主要以碳酸盐结合态、Fe-Mn氧化物结合态以及残渣态存在,Cd主要以可交换态与残渣态存在,Cr主要以残渣态存在;生态风险评价表明,样点XX04与XX06上Cd的污染最为严重,大部分都在中度污染以上。综合评价得出,Cd是香溪河沉积物污染较为严重的重金属。
英文摘要:
      In June 2016, 30 sediment samples were collected from 5 sampling sites in the Xiangxi River Basin of the Three Gorges Reservoir area. The concentration and fraction of Pb, Cd, Cu, and Cr were analyzed using a five-step continuous extraction method. The distribution of heavy metals in the sediments was evaluated by clustering analysis. The secondary and primary ratios of heavy metals in sediments were analyzed by morphological methods. The coefficient of variation of the heavy metals was in the following order:Pb >Cd >Cu >Cr. The samples were divided into three categories using clustering analysis:XX04 in the first category, XX01 and XXCJ in the second category, and XX06 and XX08 in the third category. The morphological analysis showed that Cu was mainly present in the inorganic sulfide-bound fraction and the residual fraction. Pb was mainly present in the carbonate-bound, Fe-Mn-oxide, and residual fractions. Cd was mainly present in the exchangeable and residual fractions, and Cr was mainly present in the residual fraction. The ecological risk assessment showed that the XX04 and XX06 samples were seriously polluted. Finally, Cd is the main heavy metal pollutant in Xiangxi River sediments.
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